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Hey DGC,

So in my grow I have a NIWA grow system, a Pulse one, and an AC Infinity 4 inch exhaust fan system.  ALL 3 of them give me different readings on Temp and Relative Humidity even when all 3 sensors are in the same location.  I have also noticed that the VPD that is calculated on the Pulse one and the NIWA are different.  I have tried using the temp and humidity offsets in the NIWA so that it matched what the Pulse was reading but then it was showing a different VPD than the Pulse.

Any advice on which is more correct or best to follow?